Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/30r19 vs 245/35r19 Tire Comparison Side By Side
  235/30-19 245/35-19 Difference
Diameter inches (mm) 24.55 (623.6) 25.75 (654.1) 1.2 (30.5) 4.9%
Width inches (mm) 9.25 (235) 9.65 (245) 0.39 (10) 4.3%
Circum. inches (mm) 77.13 (1959.1) 80.9 (2054.92) 3.77 (95.82) 4.9%
Sidewall Height inches (mm) 2.78 (70.5) 3.38 (85.75) 0.6 (15.25) 21.6%
Revolutions per mile (km) 821.47 (510.44) 783.17 (486.64) -38.3 (-23.8) -4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.98 mph (33.76 km/h)
25 mph (40.23 km/h)26.22 mph (42.2 km/h)
30 mph (48.28 km/h)31.47 mph (50.64 km/h)
35 mph (56.33 km/h)36.71 mph (59.08 km/h)
40 mph (64.37 km/h)41.96 mph (67.52 km/h)
45 mph (72.42 km/h)47.2 mph (75.96 km/h)
50 mph (80.47 km/h)52.45 mph (84.4 km/h)
55 mph (88.51 km/h)57.69 mph (92.84 km/h)
60 mph (96.56 km/h)62.93 mph (101.28 km/h)
65 mph (104.61 km/h)68.18 mph (109.72 km/h)
70 mph (112.65 km/h)73.42 mph (118.16 km/h)
75 mph (120.7 km/h)78.67 mph (126.6 km/h)
80 mph (128.75 km/h)83.91 mph (135.04 km/h)
85 mph (136.79 km/h)89.16 mph (143.49 km/h)
90 mph (144.84 km/h)94.4 mph (151.93 km/h)
95 mph (152.89 km/h)99.65 mph (160.37 km/h)
100 mph (160.93 km/h)104.89 mph (168.81 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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